ok so I am having an issue with my zoas they all have this long stem. I have done some reshurch and I do believe its caused by a lack of lighting. So pretty much I have a 150 gallon have 3 led strips on it one blue one antic and one white. Not sure on exact specs and brand they came with the tank. Not sure if adding a couple more strips would help or thinking of switching to t5s. Looking for ideas or suggestion